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Alternative horticultural practices to replace a cold storage period to break dormancy in red raspberries (Rubus idaeus L.)
Thesis (M. Sc. Agric.) -- University of Stellenbosch, 1998.
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| Format: | Thesis |
| Language: | en_ZA |
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Stellenbosch : Stellenbosch University
2012
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| _version_ | 1867613981934354432 |
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| access_status_str | Open Access |
| author | Brink, Judith Elizabeth |
| author2 | Jacobs, G. |
| author_browse | Brink, Judith Elizabeth Jacobs, G. |
| author_facet | Jacobs, G. Brink, Judith Elizabeth |
| author_sort | Brink, Judith Elizabeth |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (M. Sc. Agric.) -- University of Stellenbosch, 1998. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/55803 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA |
| last_indexed | 2026-06-10T12:44:46.833Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2012 |
| publishDateRange | 2012 |
| publishDateSort | 2012 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/55803 Alternative horticultural practices to replace a cold storage period to break dormancy in red raspberries (Rubus idaeus L.) Brink, Judith Elizabeth Jacobs, G. Theron, K. I. Stellenbosch University. Faculty of AgriSciences. Dept. of Horticultural Science. Raspberries -- Dormancy Raspberries -- Effect of temperature on Dissertations -- Horticulture Thesis (M. Sc. Agric.) -- University of Stellenbosch, 1998. Red raspberries (Hubos idaeus L ) have been successfully exported from the Western Cape 10 the United Kingdom for a number of seasons There is a great demand In the United Kingdom during their winters for fresh raspberries. Although to date growers have been producing good quality raspberries for export and local markets, expansion is hampered by various problems facing the growers. A tack of sufficient winter chilling in the Western Cape, which causes primocane fruiting raspberries to experience delayed sprouting in spring and is said to be related to late flowering dates and an extended harvesting period. Floricane fruiting raspberries experience delayed foliation and a high percentage of buds that remain dormant throughout the season. In an attempt to break bud dormancy on floricanes, rest breaking chemicals were applied to floricanes. In the first year of two years of experiments, Dormex® was applied at a range of concentrations (2, 4 and 6%) and two dates. In the second year Dormex® was applied only at a 5% concentration and three dates to 'Heritage' plants and four dates and two concentrations (2.5% and 5%) to 'Glen Prosen plants. In the first year DNOC winter-oil and Partner G were also tested on 'Heritage' plants, but were not as successful as Dormex®. Dormex® at 5% was most successful on 'Heritage' plants while 2.5% gave best results on ' Glen Prosen' plants, for both cultivars the best application dates were late in July. The delayed sprouting problem in primocane fruiting raspberries was addressed by applying N-(phenylmethyl)-H-purine-6-amine and GA4+7 (Promalin) to the stumps of the previously pruned primocanes, at three concentrations (1000, 2000 and 3000 mg.l-1) on three dates. The results obtained were promising. In a second experiment hot water (45°C, 40°C and 35°C) was applied to the plants for either one, two or three hours. This experiment did not give positive results. A third experiment using gibberellic acid (GA3) was attempted to compensate for the lack of chilling to the raspberry plants. GA3 was sprayed onto young primocanes at 50 mg.l-1 on a range of dates. The earliest spray dates mimicked the harvest pattern of cold stored plants and the fast spray dates ad a similar pattern to the control plants. Masters 2012-08-27T11:37:14Z 2012-08-27T11:37:14Z 1998 Thesis http://hdl.handle.net/10019.1/55803 en_ZA Stellenbosch University 85 pages application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Raspberries -- Dormancy Raspberries -- Effect of temperature on Dissertations -- Horticulture Brink, Judith Elizabeth Alternative horticultural practices to replace a cold storage period to break dormancy in red raspberries (Rubus idaeus L.) |
| title | Alternative horticultural practices to replace a cold storage period to break dormancy in red raspberries (Rubus idaeus L.) |
| title_full | Alternative horticultural practices to replace a cold storage period to break dormancy in red raspberries (Rubus idaeus L.) |
| title_fullStr | Alternative horticultural practices to replace a cold storage period to break dormancy in red raspberries (Rubus idaeus L.) |
| title_full_unstemmed | Alternative horticultural practices to replace a cold storage period to break dormancy in red raspberries (Rubus idaeus L.) |
| title_short | Alternative horticultural practices to replace a cold storage period to break dormancy in red raspberries (Rubus idaeus L.) |
| title_sort | alternative horticultural practices to replace a cold storage period to break dormancy in red raspberries rubus idaeus l |
| topic | Raspberries -- Dormancy Raspberries -- Effect of temperature on Dissertations -- Horticulture |
| url | http://hdl.handle.net/10019.1/55803 |
| work_keys_str_mv | AT brinkjudithelizabeth alternativehorticulturalpracticestoreplaceacoldstorageperiodtobreakdormancyinredraspberriesrubusidaeusl |